Free radical decay and micro-structure evolution of PVDF membranes in situ irradiated by synchrotron radiation X-ray

Yang Liu; Jingyuan Ma; Weihua Liu; Fenggang Bian; Xiuhong Li; Zhongfeng Tang; Yuying Huang; Feng Tian

Polymer Testing (Apr 2022)

Free radical decay and micro-structure evolution of PVDF membranes in situ irradiated by synchrotron radiation X-ray

Yang Liu,
Jingyuan Ma,
Weihua Liu,
Fenggang Bian,
Xiuhong Li,
Zhongfeng Tang,
Yuying Huang,
Feng Tian

Affiliations

Yang Liu: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Jingyuan Ma: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Weihua Liu: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Fenggang Bian: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Xiuhong Li: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Zhongfeng Tang: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, China; National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author. P.O. Box 800-204, Shanghai, 201800, China.
Yuying Huang: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.
Feng Tian: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China; University of Chinese Academy of Sciences, Beijing, 100049, China; National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.

Journal volume & issue: Vol. 108
p. 107507

Abstract

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The synchrotron radiation X-ray was used both as the irradiation source and testing tool for the PVDF membranes in-situ. The structural evolution of the PVDF membranes irradiated by the synchrotron radiation X-ray was analyzed by in-situ small angle X-ray scattering (SAXS)/wide angle X-ray scattering (WAXS) and ex-situ (ESR, FTIR and XRD) characterization methods. The alkyl radicals and carbon-carbon double bonds appeared in the irradiated PVDF membranes due to the irradiation effect, which confirmed that PVDF membranes first cracked, followed by cross-linked, during irradiation. The disappearance of the scattering peak at q = 0.05 Å−1 indicated that the synchrotron radiation X-ray destroyed the long periodic structure. The X-ray irradiation destroyed the crystalline region of the irradiated PVDF membranes, thus, leading to a decline in the crystallinity. Thus, overall, the in-situ irradiation and analysis could effectively monitor the structural evolution of the PVDF membranes during the radiation process and reduce the influence of time intervals between irradiation and measurement.

Published in Polymer Testing

ISSN: 0142-9418 (Print); 1873-2348 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Polymers and polymer manufacture
Website: https://www.journals.elsevier.com/polymer-testing

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